Abstract
The friction condition of tool-chip contact zone plays an important role in the evaluation of cutting deformation in high speed machining. The theoretical model of normal stress and friction stress in tool-chip zone were investigated and consistent with the internal friction law. Cutting force and friction average angle were obtained in high speed machining aluminum alloy 7050-T7451 by means of orthogonal turning measurement and FEM simulation (Deform-2D). The influence tendency of cutting speed on friction coefficient and friction angle was studied with the increases of cutting speed, the friction coefficient has an obvious declining tendency (from 0.46 to 0.31). When the cutting speed exceeds 1000m/min, the friction coefficient may gradually stabilize and has a downward trend.
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